<template>
<div>
    <APP v-if="isvaild"></APP>
    <button @click="isvaild=!isvaild">删除</button>
</div>
</template>

<script setup>
    import { ref } from 'vue';
    import APP from './App05.vue'
    let isvaild=ref(true)
</script>

<style scoped>
</style>